September weather forecast
Plaquemine, LA

Share

Weather in September

The first month of the autumn, September, is also a hot month in Plaquemine, Louisiana, with temperature in the range of an average high of 87.3°F (30.7°C) and an average low of 70.3°F (21.3°C).

Temperature

Plaquemine experiences a subtle adjustment in high-temperatures to a still tropical 87.3°F (30.7°C) with the onset of September, maintaining near parity with August's 91.2°F (32.9°C). September witnesses an average low-temperature hovering around an agreeable 70.3°F (21.3°C).

Heat index

September's heat index is estimated at a blisteringly hot 104°F (40°C). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In Plaquemine, the average relative humidity in September is 79%.

Rainfall

In September, the rain falls for 16 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Plaquemine, during the entire year, the rain falls for 148.6 days and collects up to 15.51" (394mm) of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

In Plaquemine, the average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 6:42 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:51 pm CDT.

Sunshine

In September, the average sunshine is 9.7h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 6 during September translates into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

The average high-temperature, in September, in Plaquemine, is 87.3°F (30.7°C), while the average low-temperature is 70.3°F (21.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 104°F (40°C).

What is the average humidity in September in Plaquemine?

In September, the average relative humidity is 79%.

How much does it rain in September?

In Plaquemine, in September, during 16 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.

When it does not snow?

In Plaquemine, snow does not fall in February through December.

How many hours of daylight does Plaquemine have in September?

In Plaquemine, the average day length in September is 12h and 20min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:42 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:51 pm CDT.

How many hours of sunshine does Plaquemine have in September?

In Plaquemine, the average sunshine duration in September is 9.7h.

What is the UV index reading in September?

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Plaquemine, LA

Average temperature in September - Plaquemine, LA
  • Average high temperature in September: 87.3°F

The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (59°F).

  • Average low temperature in September: 70.3°F

The month with the highest average low temperature is August (74.5°F).
The coldest month (with the lowest average low temperature) is January (43.5°F).

Average pressure in September
Plaquemine, LA

Average pressure in September - Plaquemine, LA
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.96"Hg).

Average wind speed in September
Plaquemine, LA

Average wind speed in September - Plaquemine, LA
  • Average wind speed in September: 4.7mph

The windiest month (with the highest average wind speed) is February (6.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September
Plaquemine, LA

Average humidity in September - Plaquemine, LA
  • Average humidity in September: 79%

The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September
Plaquemine, LA

Average rainfall in September - Plaquemine, LA
  • Average rainfall in September: 1.18"

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is March (0.67").

Average rainfall days in September
Plaquemine, LA

Average rainfall days in September - Plaquemine, LA
  • Average rainfall days in September: 16 days

The month with the highest number of rainy days is August (20.9 days).
The month with the least rainy days is November (7.1 days).

Average snowfall in September
Plaquemine, LA

Average snowfall in September - Plaquemine, LA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September
Plaquemine, LA

Average snowfall days in September - Plaquemine, LA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in September /
Average sunshine in September
Plaquemine, LA

Average daylight in September / Average sunshine in September - Plaquemine, LA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in September
Plaquemine, LA

Average sunshine days in September - Plaquemine, LA
  • Average sunshine days in September: 11.3 days

The month with the most sunshine days is November (21.4 days).
The months with the least sunshine days are July and August (7.3 days).

Average UV index in September
Plaquemine, LA

Average UV index in September - Plaquemine, LA
  • Average UV index in September: 6

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in September
Plaquemine, LA

Average cloud cover in September - Plaquemine, LA
  • Average cloud cover in September: 31

The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 27).

Average visibility in September
Plaquemine, LA

Average visibility in September - Plaquemine, LA
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, June, October, November and December (6mi).
The months with the lowest visibility are March, April, May, July, August and September (5mi).

Plaquemine, Louisiana, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location